new this morning, australia's prime minister has announced that after more than 50 days the hunt for malaysia flight 370 is entering a new phrase. the aerial search is ending but the underwater search will be expanded as more sophisticated deep water vehicles can be brought in. that search could take eight months. no debris has been recovered yet. authorities assured victims' families they will do everything possible to solve the mystery. >>> well, the coast guard has been searching for a pilot in the northern part of san francisco bay after two small planes collided in midair. the two aircraft had taken off from the same airport about 20 miles north. one plane landed in the water. the other pilot along with his wife managed to land safely. neither was injured. >>> president obama is in the philippines this morning. he's signing a ten-year security agreement that will boost the u.s. military presence in that country and give american forces temporary access to military camps and allow them to pre-position fighter jets and ships. this is the last stop in the president's four-nation asia tour.